IP Location

The node used to control cable modems in a cable network system.

Call Detail Records include information that is retained in response to a number of events within 3GPP networks. They have a common format, but can include data related to a range of network events, in particular call establishment and termination. These are used for charging purposes, and they are known as a Charging Data Record in other contexts.

In IMS, the CSCF is a SIP proxy that manages call flow. There are three forms of CSCF: the Proxy CSCF (P-CSCF), which exists in the access network; the Serving CSCF (S-CSCF), which exists in the core network; and the Interrogating CSCF (I-CSCF), which acts as a gateway server for external access purposes. The S-CSCF has the most important role; it acts as registrar and is on the signaling path for all calls.

CHAP is one possible PPP authentication protocol.

CDMA is a radio transmission technology that uses spreading codes to layer multiple signals in the same frequency spectrum.

Also, CDMA is used to refer to a 3GPP2 cellular network technology that uses CDMA for radio access.

Confidence is a measure of the likelihood of a target being at a specified location or within a given region of uncertainty, which is usually expressed as a percentage.

See also uncertainty.

A coordinate system is a means of assigning a tuple of numbers to a point in space. A coordinate reference system links this to real space by defining the origin, orientation, and scale of the coordinate system.

DOCSIS is the name given to the specifications for residential cable Internet access.

Diameter is an AAA protocol that is designed to improve on RADIUS. The major differences are that it uses a secured streaming protocol rather than a datagram protocol, and has changes that reduce the management overhead of deployment (discovery, capability negotiation).

DSL is a "last mile" solution that uses existing telephony infrastructure to deliver high-speed Internet access. DSL standards are administered by the DSL Forum (http://dslforum.org/).

A DSLAM terminates DSL signals at the local exchange.

DNS is a globally distributed database for the resolution of names to addresses.

DHCP is a widely used configuration protocol that allows a host to acquire configuration information from a visited network and, in particular, an IP address. DHCP is based on BOOTP with which it retains backward compatibility with.

E911 is a series of enhancements to the U.S. emergency telephony system that ensures a PSAP is able to acquire location information about a caller.

EDGE is an enhancement to GSM and GPRS that increases data transmission rates.

ETSI is the organization responsible for setting ICT standards within Europe.

XML is a data format that permits the expression of human-readable data in structured form.

The FCC is the U.S. regulatory body responsible for telecommunications policy.

The FLAP protocol represents a protocol framework for the acquisition of location measurements.

In Mobile IP, the FA is the agent in the visited network responsible for ensuring that packets arrive at the device.